CN205368031U - Sewage treatment device - Google Patents
Sewage treatment device Download PDFInfo
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- CN205368031U CN205368031U CN201521108510.7U CN201521108510U CN205368031U CN 205368031 U CN205368031 U CN 205368031U CN 201521108510 U CN201521108510 U CN 201521108510U CN 205368031 U CN205368031 U CN 205368031U
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- 239000010865 sewage Substances 0.000 title claims abstract description 71
- 238000011282 treatment Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 134
- 239000012528 membrane Substances 0.000 claims abstract description 69
- 238000000909 electrodialysis Methods 0.000 claims abstract description 62
- 238000009292 forward osmosis Methods 0.000 claims description 53
- 238000003860 storage Methods 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 2
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- 239000000243 solution Substances 0.000 description 35
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- 230000008569 process Effects 0.000 description 21
- 239000010410 layer Substances 0.000 description 16
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 11
- 239000013505 freshwater Substances 0.000 description 10
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- 239000010802 sludge Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
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- 229910021642 ultra pure water Inorganic materials 0.000 description 2
- 239000012498 ultrapure water Substances 0.000 description 2
- BDOYKFSQFYNPKF-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetic acid;sodium Chemical compound [Na].[Na].OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O BDOYKFSQFYNPKF-UHFFFAOYSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The utility model relates to a sewage treatment field, an in particular to sewage treatment's device. The device includes: anaerobism bioreactor, with the positive osmotic membrane subassembly that anaerobism bioreactor is linked together draws liquid reservoir with positive osmotic membrane subassembly is linked together to reach and draw the electrodialysis subassembly that liquid reservoir is linked together.
Description
Technical field
This utility model relates to sewage treatment area, particularly to one way of life sewage-treatment plant.
Background technology
Along with the continuous expansion of socioeconomic sustainable development and population size, the city water resource problem polluting aggravation with water in short supply, day by day become the key factor of restriction China Town Sustainable Development.City size continuous enlargement, causes that municipal water demand increases sharply, sewage treatment load sustainable growth, and city water resource guarantee and sewage disposal level are proposed new requirement by this.
In recent years, sewage is as pollutant carrier and processes object, and by its abundant water resource contained and Organic substance, studied persons think a kind of Renewable resource.Carrying out of sewage recycling, it is possible to effectively increase Reclaimed Municipal Wastewater supply, alleviate Water Resources Pressure, decrease sewage discharge total amount simultaneously, protect Urban Water Ecological Environment.The Organic substance contained in sewage can realize the energy or resource reclaim by sewage energy means, produces biogas and inorganic salt and other material.
Traditional aerobic membrane bioreactor technique achieves the combination of membrance separation and Aerobic biological process.Good by its effluent quality, take up an area the advantages such as little, the membrane biological reactor process of this kind of type is widely used in fields such as municipal sewage treatments.But, such membrane bioreactor has the problem such as high energy consumption, fouling membrane, causes that the operating cost of technique is higher.
For this problem, it is necessary to the method and apparatus working out a kind of novel sewage disposal.
Utility model content
For the problems referred to above, principle in line with energy-saving and emission-reduction, energy recovery, for the pollutant in municipal sewage, make use of anaerobic biological reactor, forward osmosis membrane assembly and electrodialysis process, have developed a kind of sewage treatment process for processing the anaerobic biological reactor of sanitary sewage, forward osmosis membrane assembly and electrodialysis coupling, sewage can be processed, reclaim the energy, and reach the purpose driving liquid to recycle.
Therefore, this utility model provides a kind of method of sewage disposal, and it comprises the steps:
Step A: described sewage is carried out anaerobic bio-treated, obtains sewage mixed liquor；
Step B: utilize and drive liquid to make water penetration in described sewage mixed liquor in described driving liquid, obtaining drawing liquid by positive osmosis, wherein, described in draw the mixed liquor that liquid is described driving liquid and the water penetrated into driving liquid from sewage mixed liquor；
Step C: the described water drawn in liquid is separated by electrodialysis.
Wherein driving liquid can be hyperosmotic solution, for instance sodium chloride solution, magnesium chloride solution, disodium ethylene diamine tetra-acetic acid solution and sucrose solution etc..Wherein the concentration of sodium chloride solution can be the scope of 0.5-1.5mol/L, when this driving liquid concentration, water outlet situation after anaerobic biological reactor and forward osmosis membrane combination process sewage can reach following index: COD concentration < 20mg/L, ammonia nitrogen < 5mg/L, total nitrogen (TN) < 5mg/L, total phosphorus (TP) inspection substantially does not measure, for instance total phosphorus < 0.1mg/L.
In this utility model, anaerobic biological reactor, forward osmosis membrane are coupled with electrodialysis, both anaerobic biological reactor and forward osmosis membrane had been utilized to process sewage, the fresh water drawn in liquid is separated by available electrodialysis again, and after fresh water is separated, obtain concentration electric osmose concentrated solution owing to drawing liquid, and invention is further used as driving liquid by arranging cleverly to reclaim this electric osmose concentrated solution, thus having reached the purpose recycled.
Forward osmosis membrane is combined with anaerobic biological reactor, both can guarantee that the treatment effect to sanitary sewage, the shortcoming that anaerobic biological reactor effluent quality is bad can be overcome again, obtain the water outlet of cleaning, but anaerobic biological reactor is still limited to the removal ability of nitrogen phosphorus, nitrogen phosphorus can be retained by forward osmosis membrane, only has hydrone can pass through forward osmosis membrane in theory.
Draw after liquid is pumped to electrodialysis plant, it is separated into fresh water and electrodialysis concentrated solution, wherein fresh water is collected, in order to recycle, electrodialysis concentrated solution is automatically added into according to electrical conductivity feedback controls system and draws in liquid, to keep driving liquid concentration to be basically unchanged.
In a specific embodiment, water in described sewage mixed liquor is penetrated into the enriched mixture obtained after driving in liquid, described enriched mixture is used to anaerobic bio-treated, and described enriched mixture is the residue after the water in described sewage mixed liquor is saturated away.Wherein, in the ordinary course of things, the water in sewage mixed liquor is only partially saturated away.
In a specific embodiment, in described step C, described in draw the water in liquid and be separated and obtain electrodialysis concentrated solution afterwards, described electrodialysis concentrated solution is recovered and is used as described driving liquid.Wherein, in the ordinary course of things, the water drawn in liquid is only partially separated.
In a specific embodiment, sewage, for instance the COD concentration of sanitary sewage is 520-560mg/L, ammonia nitrogen is 40-60mg/L, and total nitrogen, total phosphorus concentration are respectively at 45-60mg/L and 5-10mg/L.In practical operation, concentration of wastewater can be suitable with it.
This utility model additionally provides a kind of sewage-treatment plant, comprising:
Anaerobic biological reactor,
The forward osmosis membrane assembly being connected with described anaerobic biological reactor,
The liquid that draws being connected with forward osmosis membrane assembly stores container, and
The electrodialysis assembly that container is connected is stored with drawing liquid.
Wherein, before carrying out sewage disposal, draw in liquid storage container owing to driving liquid to be stored in, but when carrying out sewage disposal, it is stored in the liquid drawn in liquid storage container owing to containing the fresh water being permeated from forward osmosis membrane assembly, therefore, it is stored in and draws liquid and store the liquid in container and can may also be referred to as and draw liquid.And it is used to recycle, so more precisely, when liquid flows to forward osmosis membrane assembly from drawing liquid storage container, and draw liquid storage container from the electrodialysis assembly flow direction, this liquid can be called driving liquid, wherein, flow to the liquid drawing liquid storage container from electrodialysis assembly and can also be called electrodialysis concentrated solution visually；Draw liquid store container when liquid flow to from forward osmosis membrane assembly, and from draw liquid store container flow to electrodialysis assembly time, this liquid can be called and draws liquid.
In a specific embodiment, described forward osmosis membrane assembly includes the first chamber and the second chamber.
In a specific embodiment, the outlet of described anaerobic biological reactor is connected with the entrance of described forward osmosis membrane assembly；The outlet of described forward osmosis membrane assembly is connected with the entrance of described anaerobic biological reactor.That is, described anaerobic biological reactor and described forward osmosis membrane assembly are configured to make the sewage mixed liquor in described anaerobic biological reactor to flow to described forward osmosis membrane assembly, and make the sewage mixed liquor in described forward osmosis membrane assembly obtain enriched mixture through positive osmosis residue to flow to described anaerobic biological reactor.More specifically, the outlet of described anaerobic biological reactor is connected with the entrance of the first chamber of described forward osmosis membrane assembly；The outlet of the first chamber of described forward osmosis membrane assembly is connected with the entrance of described anaerobic biological reactor.
In a specific embodiment, the outlet drawing liquid storage container described in is connected with the entrance of described electrodialysis assembly；The outlet of described electrodialysis assembly is connected with the described entrance drawing liquid storage container.That is, described draw liquid store container and described electrodialysis assembly be configured to make described in draw driving liquid stream that liquid stores in container to described electrodialysis assembly, and make in described electrodialysis assembly drawing liquid electrodialysis concentrated solution after electrodialysis concentrates flow to described in draw liquid and store container.
In a specific embodiment, the second outlet drawing liquid storage container described in is connected with the second entrance of described forward osmosis membrane assembly；Second outlet of described forward osmosis membrane assembly is connected with the second entrance drawing liquid storage container.That is, described state draw liquid store container and described forward osmosis membrane assembly be configured to make described in state and draw driving liquid stream that liquid stores in container to described forward osmosis membrane assembly, and make the liquid stream that draws in described forward osmosis membrane assembly store container to the described liquid that draws.More specifically, the outlet drawing liquid storage container described in is connected with the entrance of the second chamber of described forward osmosis membrane assembly；The outlet of the second chamber of described forward osmosis membrane assembly is connected with the described entrance drawing liquid storage container.
In a specific embodiment, store to arrange between container and described electrodialysis assembly draw liquid concentration sensor and/or electrodialysis concentrated solution concentration sensor at the described liquid that draws.In particular, it is provided with in the described junction drawing outlet and the entrance of described electrodialysis assembly that liquid stores container and draws liquid concentration sensor；Outlet at described electrodialysis assembly is provided with electrodialysis concentrated solution concentration sensor with the described junction drawing the entrance that liquid stores container.
Wherein drawing liquid concentration sensor and measure the concentration drawing liquid, electrodialysis concentrated solution concentration sensor can measure the concentration of electrodialysis concentrated solution.When detecting that the concentration drawing liquid is lower than 0.5M/L, when being especially less than 0.3M/L, start electrodialysis assembly and process drawing liquid.When concentration electrodialysis concentrated solution being detected is higher than 0.5M/L, it is preferable that during higher than 1.0M/L, it is particularly preferred to during higher than 1.5M/L, reclaim electrodialysis concentrated solution and store in container to drawing liquid.
In a specific embodiment, draw liquid storage assembly described in be placed on weighing apparatus such as balance.
In a specific embodiment, described anaerobic biological reactor is connected with mixing component, it is preferable that being provided with multiple blade on the puddler of described mixing component is full-mixing type configuration.Particularly on described puddler, axially spaced formula is provided with multiple blade, thus can make what the sewage mixed liquor in anaerobic biological reactor mixed to be more uniformly distributed in use.
In a specific embodiment, the forward osmosis membrane in described forward osmosis membrane assembly includes the active layer of ground floor and the supporting layer of the second layer；The material of preferred described active layer is Triafol T (CTA), and the material of described supporting layer is polyester.
In a specific embodiment, the gross thickness of described forward osmosis membrane is 115 μm, membrane aperture range for 0.3-1.0nm.
In forward osmosis membrane bioreactor, the water in sewage mixed liquor, under the driving of permeable pressure head, enters through film and drives liquid, and the liquid that drives of dilution realizes the production of water purification in follow-up electrodialysis process and drives the regeneration of liquid.
While forward osmosis membrane bioreactor inherits the advantage of conventional membrane bioreactor, also have the advantage just permeated concurrently, mainly include following some:
(1) being conducive to avoiding pollutant to adhere to owing to forward osmosis membrane has hydrophilic, therefore forward osmosis membrane bioreactor has less fouling membrane potentiality；
(2) forward osmosis membrane bioreactor need not external pressure drive in membrane separating process, it is possible to saves power consumption, reduces operating cost；
(3) forward osmosis membrane bioreactor has the rejection higher than conventional membrane bioreactor, has better performance particularly in for micro-content organism and pathogenic bacterium aspect, and effluent quality can reach higher standard.
Therefore, forward osmosis membrane bioreactor set membrane bioreactor and the advantage just permeated, there is very big development potentiality.
Currently, Anaerobic Biotechnology is mainly used in the process of the sewage of high concentration.In anaerobic bio-treated process, larger molecular organics is finally converted into the materials such as methane, water, carbon dioxide gradually.The superiority of Anaerobic Microbiological Treatment Technology mainly includes the following aspects:
(1) power consumption is saved
Anaerobic bio-treated process, without oxygen supply, eliminates the link of aeration.In Aerobic biological process technology, aeration electric energy consumption accounts for larger proportion.Anaerobic Biotechnology is adopted to process sewage, it is possible to save substantial amounts of electric energy.
(2) bioenergy is produced
Anaerobic fermentation can produce a large amount of biogas, has at a relatively high calorific value, is a kind of biomass energy.
(3) sludge yield is low
It is long that anaerobe has the cycle in epoch, the feature that reproduction speed is slow.Therefore the excess sludge production of anaerobic sludge is very low and stable in properties, and the expense of mud subsequent treatment is relatively low.
(4) part hardly degraded organic substance degradation capability is stronger
Although anaerobic technique has many advantages, but still has the disadvantage that
(1) the nitrogen phosphorus in sewage can not be removed
In anaerobic bio-treated process, only little nitrogen phosphorus is used for Growth of Cells, and most of the nitrogen P elements is still among water outlet.
(2) cycle is started longer
The Anaerobe generation cycle is long, increasess slowly, and is difficult to significantly rise in the sludge concentration short time.
(3) operational management is complicated
It is more that Anaerobe compares aerobe population, and microflora is significantly high for the requirement of environmental index, and operation and management level is required height.
(4) sanitary condition is poor
During anaerobic bio-treated sewage, the sulfate in sewage can reduce to generate has cacodorous hydrogen sulfide gas.Therefore anaerobic technique generally requires to seal, it is prevented that foul gas distributes.
(5) effluent quality is poor
Therefore, anaerobic treatment can not organics removal completely, it is necessary to aerobic process or other technique with the use of.
Electrodialysis is as a kind of membrane separation technique, and it is under the effect of DC electric field, with potential difference for motive force, utilizes the selective penetrated property of ion exchange membrane.Salinity in electrolyte is separated from solution, thus realizing the purpose of the concentration of product, refining or purification.Electrodialytic electrode is located at membrane stack both sides, adopts DC source as the motive force of electrodialysis desalination.Obtain after electrodialysis process can the sewage of the fresh water of reuse and discharge, the sewage salinity of discharge is high, it is impossible to uses, causes environmental pressure, how to reduce the discharge capacity of high-salt sewage, it is thus achieved that higher fresh water reclamation rate is always up the problem that electrodialytic technique needs to solve.
This utility model is compared with the sewage treatment process that tradition highly energy-consuming, high row's carbon, low-resource reclaim, and economical and effective is simple, and can efficiently concentrating process the pollutant in sewage, while ensureing effluent quality, reach energy-saving and emission-reduction, the target of resource reclaim.
Accompanying drawing explanation
Fig. 1 is sewage-treatment plant schematic diagram.
Fig. 2 is sewage water quality after sewage-treatment plant of the present utility model processes.Wherein, concentration respectively 0.5M, 1M and the 1.5M of liquid are driven.
Detailed description of the invention
Below in conjunction with preferred embodiment, the utility model is described in further detail, but protection domain of the present utility model is not limited to following embodiment.
Embodiment
Fig. 1 is shown that the schematic diagram of a kind of sewage-treatment plant.This sewage-treatment plant includes anaerobic biological reactor 4.Wherein, anaerobic biological reactor 4 be configured as full-mixing type, namely anaerobic biological reactor 4 is connected with mixing component 2, the puddler of mixing component 2 is provided with multiple blade, particularly on puddler, axially spaced formula is provided with multiple blade, the mud in anaerobic biological reactor 4 is kept to mix by mixing component 2 (such as electric blender), thus can make what the sewage mixed liquor in anaerobic biological reactor 4 mixed to be more uniformly distributed in use；The top water seal of anaerobic biological reactor 4 is airtight.The place of different depth on the sidewall of anaerobic biological reactor 4 can open four thief holes.The top of anaerobic biological reactor 4 connects with conductivity meter 3, furthermore it is also possible to perforate above anaerobic biological reactor 4, makes reactor be connected with pH meter probe, and a pore that can pass wet gas flow meter 1.The dischargeable capacity of anaerobic biological reactor 4 can be generally 2L, and this can be determined according to practical situation.The shell of anaerobic biological reactor 4 is constituted sandwich by the cavity between outer layer and internal layer and outer layer and internal layer, equipped with circulation warm water in cavity between outer layer and internal layer, and described circulation warm water can make the internal temperature of anaerobic biological reactor 4 stablize within the scope of 35-38 DEG C.Take from the mud of sewage treatment plant's anaerobic digestor to anaerobic biological reactor 4 inoculation, initial sludge concentration is 3550mg/L.The substrate combination of glucose+sodium bicarbonate is adopted at the initial stage starting anaerobic biological reactor 4, and add trace element and yeast extract in right amount to carry out Anaerobe reaction, now the sewage in anaerobic biological reactor 4 and the mixing of Anaerobe response matrix, form sewage mixed liquor.Temperature within anaerobic biological reactor 4, electrical conductivity and pH are respectively by thermometer, conductivity meter and pH meter or the assembly timing detection with above-mentioned functions, and regulation and control pH is stable between 7.0-7.8.The biogas that anaerobic biological reactor 4 produces is imported wet gas flow meter 1 by pore and measures.
Forward osmosis membrane assembly 5 connects with anaerobic biological reactor 4, at sewage in anaerobic biological reactor 4 after anaerobic bio-treated, by pump, the sewage mixed liquor in anaerobic biological reactor 4 is pumped in the first chamber 13 of forward osmosis membrane assembly 5, liquid can be driven to be pumped in the second chamber 14 of forward osmosis membrane assembly 5, and driving liquid can be the sodium chloride solution of 1.0mol/L simultaneously.Under the effect driving liquid in the second chamber 14, it is pumped into the water penetration in the sewage mixed liquor in the first chamber 13 in the second chamber 14, so make the water dilution driving liquid to be saturated in the second chamber 14, obtaining drawing liquid, what obtain is drawn liquid and can be pumped into by pump and draw liquid and store in container 11.While carrying out aforesaid operations, the sewage mixed liquor (actually due to positive osmosis, the water of the part in initial sewage mixed liquor has penetrated in the second chamber 14) in the first chamber 13 is pumped back in anaerobic biological reactor 4；The liquid that draws in second chamber 14 is pumped back to and draws liquid and store in container 11.Further, above-mentioned sewage mixed liquor circulation between forward osmosis membrane assembly 5 and anaerobic biological reactor 4 and draw liquid and at forward osmosis membrane assembly 5 and draw the circulation that liquid stores between container 11 same pump can be used to complete.
Electrodialysis assembly 8 is connected by pump with drawing liquid storage container 11, so that the liquid that draws drawn in liquid storage container 11 is pumped into the water separation that in electrodialysis assembly 8, realization is drawn in liquid, and the fresh water separated is flowed out by passage 9, and remaining liquid is owing to obtaining concentration, it is referred to as electrodialysis concentrated solution, therefore, the concentration of sodium chloride therein is relatively drawn the concentration in liquid and is wanted height, and by controlling the index that can reach to drive liquid, it is used as driving liquid at this point it is possible to be circulated back to electrodialysis concentrated solution to draw liquid storage container 11 reclaims.Container 11 can be stored it is pumped into the interchannel of electrodialysis assembly 8 and can arrange and draw liquid concentration sensor from drawing liquid drawing liquid, thus the concentration of liquid is drawn in monitoring, and determine whether to be pumped into drawing liquid electrodialysis assembly 8 from drawing liquid storage container 11 according to the concentration monitored；Can also be pumped into, from electrodialysis assembly 8, the interchannel drawing liquid storage container 11 at electrodialysis concentrated solution and electrodialysis concentrated solution concentration sensor is set, thus monitoring electrodialysis concentrated solution concentration.And determine whether to be pumped into electrodialysis concentrated solution from electrodialysis assembly 8 according to the concentration monitored and draw liquid and store container 11.When electrodialysis assembly 8 works, under the effect of applying direct current and ion exchange membrane, draw liquid and be separated into electrodialysis concentrated solution and fresh water, wherein fresh water is flowed out by passage 9 and is collected, so that recycling afterwards, electrodialysis concentrated solution is automatically added into according to electrodialysis concentrated solution concentration sensor and draws in liquid storage container 11.Storing in container 11 can arrange agitator 15 drawing liquid, agitator 15 can be such as magnetic stir bar, can ensure that drawing liquid stores and draw the uniform of liquid concentration in container 11 by stirring.
In this utility model, it is possible to selecting the forward osmosis membrane that HTI company of the U.S. produces, model is CTA-ES.Forward osmosis membrane has dissymmetrical structure, is made up of active layer and supporting layer.Active layer material is CTA, and supporting layer material is polyester.Film gross thickness is 115 μm, and membrane aperture ranges for 0.3-1.0nm.According to the operation instruction that film producer provides, new film carries out 2-3 time with ultra-pure water before use and soaks, and film thoroughly to remove the glycerol protective layer on film surface, is then immersed in ultra-pure water, preserves under 4 DEG C of environment by each 30min.Forward osmosis membrane module configurations is plate film assembly, and effective film area is 200cm2, flow channel depth is 7mm.The active layer of film is facing to the side of sewage mixed liquor.Sewage mixed liquor and the dischargeable capacity driving liquid can be all 2L.
Drawing liquid storage container 11 can be placed on electronic balance 12, draw liquid mass change by the computer recording being connected with balance 12, the mass change drawing liquid according to the unit interval calculates flux data.The electrical conductivity driving liquid and sewage mixed liquor is detected by conductivity meter 3, and connects computer recording data.Sodium chloride concentration in solution can be calculated by electrical conductivity-sodium chloride concentration relation curve.
For ensureing positive process of osmosis drives the homeo-osmosis of liquid, native system adopts and draws liquid concentration sensor and electrodialysis concentrated solution concentration sensor, the electrodialysis concentrated solution obtained after being automatically added to electrodialysis when driving liquid to be diluted, to keep driving liquid concentration stable, controls the electrical conductivity drawing liquid concentration sensor and electrodialysis concentrated solution concentration sensor in setting value ± 1% scope respectively.
Before on-test, first confirm that the liquid level in anaerobic biological reactor 4, and add process sewage to specifying position；Draw liquid to store in container 11 when processing initial equipped with driving liquid.Open the agitator 15 drawn in liquid storage container 11 to ensure to drive the uniform of liquid, open the pore of the anaerobic biological reactor 4 being connected with gas flowmeter 1 simultaneously, temporarily cancel the air-tight state of anaerobic biological reactor 4；Slow start circulating pump, make anaerobic biological reactor 4 anaerobic sludge and initial draw liquid store in container 11 equipped with the first chamber 13 and the second chamber 14 driving liquid to be slowly full of forward osmosis membrane assembly 5 respectively, termination of pumping after being full of, debugging conductivity meter 3 and balance 12 data acquisition equipment, record gas flowmeter 1 reading, close the pore of anaerobic biological reactor 4, recover the airtight of anaerobic biological reactor 4；The rotating speed turn on pump specified according to test plan subsequently, starts simultaneously at data acquisition.After off-test, it is first shut off circulating pump, stops the data acquisition of balance 12 and preserve data, read the registration of the gas flowmeter 1 of the pore being arranged on anaerobic biological reactor 4, because aerogenesis situation can reflect the activity of anaerobic sludge；Then reverse turn on pump, empties membrane module.Then can stop the sewage mixed liquor in stirring anaerobic biological reactor 4 quiet heavy 1h, take out the supernatant of anaerobic biological reactor 4, and the liquid that draws drawn in liquid storage container 11 is replaced with fresh driving liquid to carry out the sewage disposal of next round better.
Although this utility model is described with reference to its detailed description of the invention, but it should be appreciated by those skilled in the art when the real spirit and scope without departing from the present invention, it is possible to the various changes carried out.Furthermore, it is possible to be variously changed to adapt to specific situation to the main body of the present invention, spirit and scope.All these change is included in scope of the claims of the present utility model.
Claims (9)
1. a sewage-treatment plant, comprising:
Anaerobic biological reactor,
The forward osmosis membrane assembly being connected with described anaerobic biological reactor,
The liquid that draws being connected with forward osmosis membrane assembly stores container, and
The electrodialysis assembly that container is connected is stored with drawing liquid.
2. device according to claim 1, it is characterised in that the outlet of described anaerobic biological reactor is connected with the entrance of described forward osmosis membrane assembly；The outlet of described forward osmosis membrane assembly is connected with the entrance of described anaerobic biological reactor.
3. device according to claim 1 and 2, it is characterised in that described in draw liquid store container outlet be connected with the entrance of described electrodialysis assembly；The outlet of described electrodialysis assembly is connected with the described entrance drawing liquid storage container.
4. device according to claim 1 and 2, it is characterised in that store to arrange between container and described electrodialysis assembly draw liquid concentration sensor and/or electrodialysis concentrated solution concentration sensor at the described liquid that draws.
5. device according to claim 1 and 2, it is characterised in that described in draw liquid store container be placed on weighing apparatus.
6. device according to claim 1 and 2, it is characterised in that described anaerobic biological reactor is connected with mixing component.
7. device according to claim 6, it is characterised in that be provided with multiple blade on the puddler of described mixing component.
8. device according to claim 7, it is characterised in that axially spaced formula is provided with multiple blade on described puddler.
9. device according to claim 1 and 2, it is characterised in that the forward osmosis membrane in described forward osmosis membrane assembly includes the active layer of ground floor and the supporting layer of the second layer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109632566A (en) * | 2018-12-18 | 2019-04-16 | 海若斯（北京）环境科技有限公司 | A kind of activated sludge respiration rate measurement device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109632566A (en) * | 2018-12-18 | 2019-04-16 | 海若斯（北京）环境科技有限公司 | A kind of activated sludge respiration rate measurement device and method |
| CN109632566B (en) * | 2018-12-18 | 2021-07-06 | 海若斯（北京）环境科技有限公司 | Determination method based on activated sludge respiration rate determination device |
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